@inproceedings{ML-1989-DietzenP,
	author        = "Scott Dietzen and Frank Pfenning",
	booktitle     = "{Proceedings of the Sixth International Workshop on Machine Learning}",
	isbn          = "1-55860-036-1",
	pages         = "447--449",
	publisher     = "{Morgan Kaufmann}",
	title         = "{Higher-Order and Modal Logic as a Framework for Explanation-Based Generalization}",
	year          = 1989,
}